Burnish ing-machine



(No Model.)

H. PLNIGHULS. Bmrnishing Machine.

5NITl-:D STATES y HOWARD P. NICHOLS, OF READING, MASSACHUSETTS.

BURNISHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 230,430, dated July 27, 1880. Application filed J une 2, 1880. (No model.)

To all whom it may concern Be it known that I, HOWARD P. NICHOLS, a citizen of the United States, residing at Reading, county of Middlesex, State of VMassachusetts, have invented certain Improvements in Burnishing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for burnishing or polishing the edges of heels or soles of boots and shoes in which the burnishing agent is a rotary Wheel or disk.

My invention is directed to a convenient and effective means of imparting heat to the burnishing-tool without making use of a gasjet or lamp; and it consists in the combination and arrangement, for this purpose, of the mechanical devices hereinafter described.

The drawings accompanying this specification represent, in Figures 1 and 2, vertical sections of a machinercontaining my improvements, while Fig. 3 is an end elevation of the same. l

ln said drawings the frame ofthe machine is shown at A as composed, in the present instance, of a vertical column or pedestal, B, bearing upon its upper end oppositely-disposed curved arms O (l, the upper or outer ends of which constitute bearings for the journals of a horizontal shaft, D, one extremity of which carries a driving-pulley, by which it is put in rotation.

Upon the center of the shaft D is mounted and fixed a pair of circular disks or wheels, E E, each having a periphery of a form corresponding to the form of the edge of a boot sole or heel, as the case may be, and the'inner edges of lthese peripheries are let slightly into an annular opening, F, in an upright ringshaped standard, Gr, erected upon the top of the column B, the periphery of this standard G constituting a bearing for the tread of the boot heel or sole, the object in introducing the edges of the rotary wheels into the opening being to prevent the unfinished appearance to the corner of the heel or sole which would result if the edges of the wheels were outside of the standard. 5o

The periphery of each wheel E E overhangs the central body-portion, a, upon the inside, as shown in the drawings, thereby-providing an intermediate annular chamber, I), and within this chamber I place a circular annular disk or ring, H, of metal or other suitable material, of a diameter somewhat less than that of the inclosure b, the periphery c of the ring` operating, with the conjoint inner peripheries, d d, of the two wheels E E upon one side, to produce 6o heat by friction, as hereinafter stated.

A screw, c, is screwed through one side of the ring standard G, and so as to abut at its inner end against the periphery of the ring H. By turning the screw in one directionthat is, inward-a suicient distance the opposite edge of the ring H is crowded against the inner peripheries of the burnishing-wheels E E, the friction thus engendered serving to impart to such wheels the degree of heat which 7o is requisite to obtain the desired burnished surface.

Should the burnishing-tools become unduly hot the screw. is to be withdrawn until the ring is removed from pressure-contact with the wheels, when the temperature ofthe Wheels will be reduced, and vvice versa.

In order to ascertain the degree of heat of the burnishing-wheels I employ a thermometer, which is secured to an adjacent part ofSo the machine-frame-for instance, a post, f, erected upon the top of the column B-and with its lower end and bulb entering the chamber surrounding the peripheries of the wheels E E. `8 5 As the heat imparted to the burnishingwheels will be radiated to a considerable eX- tent from the latter into the inclosure, and it lwill be an easy matter to ascertain the average difference in temperaturebetween such in- 9o closure and the rings, the temperature of the latter can be easily determined by ascertaining that of the former, and the thermometer becomes available for this purpose.

I claiml. The two burnishingwheels and their scribed, for varying the pressure of said ring against said wheels. Io

In testimony whereof I affix my signature in presence of two Witnesses.

HOWARD P. NICHOLS.

Witnesses:

F. CURTIS, H. E. LODGE. 

